A Tape with Versatility
Originally developed for heating, ventilation and air conditioning (HVAC) applications, duct tape is used today in a variety of maintenance, repair and construction settings. 3M™ Heavy Duty Duct Tape 3939 is an excellent choice for general indoor application in MRO and construction. The tape was tested for flame spread using test method UL723, ASTM E84 and can be used at temperatures as high as 200°F for up to 30 minutes. The sturdy cloth-reinforced tape can be torn from the roll by hand and sticks instantly, providing a wide range of convenient solutions. This tape has a classic silver-colored backing.
Recommended Applications
- Patching
- Bundling
- Reinforcing
- Tabbing
- Taping / splicing insulation
- Capping pipe
- Securing conduit ends
- Marking
- Labeling
- Temporary repair
- Hanging poly (polyethylene drapes)
- Protecting against light sandblast overspray
Built to Stick
3M’s family of rugged cloth and duct tapes adheres to most surfaces for applications ranging from bundling to moisture proofing, sealing to splicing, reinforcing to hanging poly drapes. Available in a variety of colors and strengths, they’re known best for their hand tearability, high tensile strength and conformability.

3M 22404, Roloc Disc 361F, 80 YF-weight, TR, 3 in, Die R300V, 7000045100
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 35790, 675L, 1" X 120", 74u, Diamond Microfinishing Film Belts, 7010509196
3M 22397, Roloc Disc 361F, 60 YF-weight, TR, 1-1/2 in x NH, 7000045097
3M 26005, PPS Series 2.0 Adapter, Type S4, 12 mm Female, 1.0 mmThread, 7100135830
3M 26122, PPS Series 2.0 Cup, Midi (13.5 fl oz, 400 mL), 7100135960, 2 per carton
ACS Diamond Cloth Belt, CX1250 1/4" X 24" 75U
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 14000 Dynafile Abrasive Belt Tool
Dynabrade 56739 .4 hp 7 Degree Offset Die Grinder, Central Vacuum, 18,000 RPM, 1/4" Collet
3M 22395, Roloc Disc 361F, 60 YF-weight, TR, 3 in, Die R300V, 7000045098
3M 37001, Combination Dual Airline Back-Mounted Breathing Tube SA-2600/37001(AAD), 7000002044, 1 EA/Case
Standard Abrasives 880513, Buff and Blend GP Wheel, 3 in x 1 Ply x 1/4 in A VFN, 7100094749
3M 35833, Hookit Dust Extraction Flexible Radius Sanding Block Kit, 7100259118
3M 64324, Foil Tape 3340, Silver, 72 mm x 45.7 m, 3.9 mil, 7010335734
Dynabrade 95544 Gear Grease, 2.5oz. Tube
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
3M 16151, PTFE Glass Cloth Tape 5451, Brown, 3/4 in x 36 yd, 5.6 mil, 7000050135
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
3M 27551, EMI Copper Foil Shielding Tape 1181, 1/2 in x 18 yd (12.70 mm x 16.5m), 7000132182 
